Band saw guide



G. BURTON BAND SAW GUIDE Aug. 9, 1932.

Filed Feb. 9, 1931 2 sheets sheec George fizarijoiv 1 NI "EN TOR.

A TTORNEY.

G. BURTON BAND SAW GUIDE Aug. 9, 1932.

Filed Feb. 9, 1931 2 Sheets-Sheet 2 Georgie ,BZLTZOIQ/ INVEN T OR.

A TTORNEY.

the present invention, essentially embodies a against its particular guide plate and se- 90 NITED STATES PATENT OFFICE GEORGE BURTON, OF KLAMATH FALLS, OREGON BAND SAW GUIDE Application filed February 9, 1931. Serial No. 514,610.

The present invention relates generally to keepers ldfeach 01": which accommodates an band resaw machines, and more particularly adjustable saw engaging member 15. These to a saw guide therefor, whereby the work members 15 are in the nature of blocks concan be uniformly cut parallel to one side structed from any suitable material, and

thereof, irrespective of the warping or irwhich can be adjusted toward and away from regular contour of the lumber or work. each other to effectively guide the saw 13. in resa'wing lumber with band saws, it has Each block 15 is held fixed relative to the been found to be especially difiicult to make base 10 by a suitable fastening element 16. the out the same distance from one side of These elements are preferably in the nature '10 the work, due to warping or to the irregular of set screws which have their free ends bearcontour of the boards or strips. ing against wear plates 17 reposing upon the My invention overcomes these difiiculties blocks 15. In order that a nicety of adjustby the provision of a laterally yieldable saw ment can beprovided for between the blocks guide designed to engage and be moved by 15, one of these blocks is susceptible of being 1 the work, whereby the saw is always lnainadjusted through the instrumentality of adtained in proper relation to the work, to injusting screws 18, which are supported by a sure cutting parallel with one side of the flange 19 rising from one longitudinal edge of lumber or work throughout the length of the the base 10 as clearly illustratedin Figure 4. latter; Arranged beneath the base 10 and sup- 29 The nature and advantages of the invenported thereby is a pair of substantially partion' will. be better understood when the lolallel work engaging plates 20, located at 0plowing detail description is read in connecposite sides of the slot 11. These plates 20 tion with he accompanying drawings, the are preferably mounted at corresponding invention resicing in the construction, coniends on suitable pivots 21', whereby they can bination and arrangement of parts as be moved toward and away from each other.

claimed. The free ends of the plates 20 are slightly In the drawings forming part of this apflared outwardly as clearly shown in Figure plication like numerals of reference indicate 8, sothat the work indicated at A- can similar parts in the several views and wherereadily enter or pass between said plates.

in: A leaf spring of angular contour is ter- Figure 1 is a side elevation of the saw minally connected with each plate 20 and the guide, illustratinga portion of the saw blade. ad acent edge of the base 10, for the pur- Figure 2 is a sectional view on line 2-2 pose of spreadlngthe plates 20, incident to of Figure 1. their release from the means employed for Figure 3 is a sectional view on line 3-3 adjusting said plates toward each other into 86 of Figure 1. operative relation. Each of these springs is Figure 4 is a sectional view on line TL-e indicated at 22, and each includes an anguof Figure l. larly disposed body portion located beneath The device forming the subject matter of the base 10, one end of each spring lying flat base 10, preferably of elongated contour as cured thereto by a suitable fastening element clearly illustrated in Figure 2, and longituindicated at 23. The opposite end of each dinally slotted for a portion of its length as spring terminates to provide a right anguat 11. This base is suspended from a suitable larly disposed extension 24: which engages han er by a laterally flexible torsional spring the adjacent longitudinal edge of the base or spring arm 12, adjacent the saw blade 13, 10 as clearly illustrated in Figure 1. the latter passing through the slot 11 of the Depending from the opposed longitudinal base as shown. Arranged upon the base 10 edges of the base 10 are spacedalined aperand located at opposite sides of the slot 11 tured lugs 25 through each of wh1ch 1s thread- "thereof, are substantially inverted U-shaped ed an adjusting screw 26, preferably charac- "to be engaged thereby.

terized by a cross handle 27. Interposed between one of these adjusting screws 26 and the adjacent plate 20, is a bowed leaf spring 28, one end of which is secured to the adjacent plate 20 by the same fastening element 23 that connects the spring 22 thereto, the free end of the spring 28 engaging the adjacent plate 20 near its free end. The purpose of the spring 28' will be presently described. The adjusting screws 26 are obviously employed to move the plates 20 toward each other, with a view of properly positionin the plates relatively for the particular wor If the adjusting screws 26 are turned in a direction to relieve the plates 20 of pressure, the springs 22 function to automatically spread or separate the plates 20 as will be readily understood.

In machines of the character described, it is frequently difficult to uniformly cut the material or work A the same distance from one side thereof, sometimes due to the shifting of the saw blade 13, or the lateral movement of the work -A as it approaches the blade, and as hereinabove stated the purposeof this invention is to overcome these difficulties, and to insure a proper out through the material, irrespective of the warping or irregularity in the shape or configuration of the article to be out.

In practice, the work -A is fed to the saw 13, between the plates 20v in any ordinary wellknown manner, prior to which,

however, the saw engaging blocks are adjusted to engage the saw blade. As the work A- approaches the saw, the latter is always held and maintained in proper relation to the work.

The torsional spring 12 allows the saw guide to yield laterally as a unit, thereby accommodating itself to warped, winding or twisted lumber. Inasmuch as the work is always engaged by the plates 20, the saw is constantly maintained in proper relation to the work so that the latter is cut parallel to the side of the work engaged by the relatively-stationary plate 20. By having one of the plates supported for yielding movement with relation to the other plate 20, it is manifest that the yieldably supported guide plate exerts a pressure against the work irrespective of any irregularities in the shape or configuration of the work itself.

.Obviously, the construction and arrangement of the spring 28 provides for this relatively yielding movement of one plate 20 with relation to the other. By virtue of this construction thesaw guide and saw as a unit iscontrolled to out parallelto one side of the work irrespective of the contour of the latter, which would be compensated for by the spring 28.

While it is believed that from the foregoing description the nature and advantages of the invention will be readily understood,

allel to but spaced from that of the saw to yieldingly mount the base for lateral movement whereby said guide accommodates itself to the lumber irrespective of the shape of the latter.

2. A saw guide for a band resaw machine, comprising a base, opposite saw-engaging members mounted upon the base, opposite lumber-engaging elements mounted on the under side of the base to receive the strip of lumber therebetween, means for mounting the base on the resaw machine for lateral yielding movement whereby said guide accommodates itself to warped lumber, said lumber-engaging elements being adjustable toward and away from each other, means for adjusting said lumber-engaging elements, said adjusting means comprising springs constantly acting to spread the lumber-engaging elements'apart, and means for mamaally a justing the lumber-engaging elements toward each other against the action of said springs to insure cutting of the lumber parallel to one side thereof.

In testimony whereof I aflix my signature.

GEORGE BURTON. 

